#!/usr/bin/env python3
# Copyright 2016 gRPC authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Runs selected gRPC test/build tasks."""

from __future__ import print_function

import argparse
import multiprocessing
import sys

import artifacts.artifact_targets as artifact_targets
import artifacts.distribtest_targets as distribtest_targets
import artifacts.package_targets as package_targets
import python_utils.jobset as jobset
import python_utils.report_utils as report_utils

_TARGETS = []
_TARGETS += artifact_targets.targets()
_TARGETS += distribtest_targets.targets()
_TARGETS += package_targets.targets()


def _create_build_map():
    """Maps task names and labels to list of tasks to be built."""
    target_build_map = dict([(target.name, [target]) for target in _TARGETS])
    if len(_TARGETS) > len(list(target_build_map.keys())):
        raise Exception("Target names need to be unique")

    label_build_map = {}
    label_build_map["all"] = [t for t in _TARGETS]  # to build all targets
    for target in _TARGETS:
        for label in target.labels:
            if label in label_build_map:
                label_build_map[label].append(target)
            else:
                label_build_map[label] = [target]

    if set(target_build_map.keys()).intersection(list(label_build_map.keys())):
        raise Exception("Target names need to be distinct from label names")
    return dict(list(target_build_map.items()) + list(label_build_map.items()))


_BUILD_MAP = _create_build_map()

argp = argparse.ArgumentParser(description="Runs build/test targets.")
argp.add_argument(
    "-b",
    "--build",
    choices=sorted(_BUILD_MAP.keys()),
    nargs="+",
    default=["all"],
    help="Target name or target label to build.",
)
argp.add_argument(
    "-f",
    "--filter",
    choices=sorted(_BUILD_MAP.keys()),
    nargs="+",
    default=[],
    help="Filter targets to build with AND semantics.",
)
argp.add_argument(
    "-e",
    "--exclude",
    choices=sorted(_BUILD_MAP.keys()),
    nargs="+",
    default=[],
    help="Target labels to exclude from building.",
)
argp.add_argument("-j", "--jobs", default=multiprocessing.cpu_count(), type=int)
argp.add_argument(
    "-x",
    "--xml_report",
    default="report_taskrunner_sponge_log.xml",
    type=str,
    help="Filename for the JUnit-compatible XML report",
)
argp.add_argument(
    "--dry_run",
    default=False,
    action="store_const",
    const=True,
    help="Only print what would be run.",
)
argp.add_argument(
    "--inner_jobs",
    default=None,
    type=int,
    help=(
        "Number of parallel jobs to use by each target. Passed as"
        " build_jobspec(inner_jobs=N) to each target."
    ),
)

args = argp.parse_args()

# Figure out which targets to build
targets = []
for label in args.build:
    targets += _BUILD_MAP[label]

# Among targets selected by -b, filter out those that don't match the filter
targets = [t for t in targets if all(f in t.labels for f in args.filter)]

# Exclude target if it has ALL of the specified exclude labels.
targets = [t for t in targets if not all(l in args.exclude for l in t.labels)]

print("Will build %d targets:" % len(targets))
for target in targets:
    print("  %s, labels %s" % (target.name, target.labels))
print()

if args.dry_run:
    print("--dry_run was used, exiting")
    sys.exit(1)

# Execute pre-build phase
prebuild_jobs = []
for target in targets:
    prebuild_jobs += target.pre_build_jobspecs()
if prebuild_jobs:
    num_failures, _ = jobset.run(
        prebuild_jobs, newline_on_success=True, maxjobs=args.jobs
    )
    if num_failures != 0:
        jobset.message("FAILED", "Pre-build phase failed.", do_newline=True)
        sys.exit(1)

build_jobs = []
for target in targets:
    build_jobs.append(target.build_jobspec(inner_jobs=args.inner_jobs))
if not build_jobs:
    print("Nothing to build.")
    sys.exit(1)

jobset.message("START", "Building targets.", do_newline=True)
num_failures, resultset = jobset.run(
    build_jobs, newline_on_success=True, maxjobs=args.jobs
)
report_utils.render_junit_xml_report(
    resultset, args.xml_report, suite_name="tasks"
)
if num_failures == 0:
    jobset.message(
        "SUCCESS", "All targets built successfully.", do_newline=True
    )
else:
    jobset.message("FAILED", "Failed to build targets.", do_newline=True)
    sys.exit(1)
